<nav class="navbar navbar-expand-lg navbar-light bg-light">
  <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
    <span class="navbar-toggler-icon"></span>
  </button>

  <div class="collapse navbar-collapse" id="navbarSupportedContent">
    <ul class="navbar-nav mr-auto">
      <li class="nav-item active">
        <a class="nav-link" routerLink="/">Getting started <span class="sr-only">(current)</span></a>
      </li>
      <li class="nav-item">
        <a class="nav-link" routerLink="/">Examples</a>
      </li>
    </ul>
  </div>
</nav>

<div class="container">
  <div class="row">
    <div class="col-12 col-lg-9">
      <router-outlet></router-outlet>
    </div>
    <div class="col-12 col-lg-3 hidden-md-down">
      <side-nav></side-nav>
    </div>
  </div>
</div>

<!-- <side-nav></side-nav>
<div class="container">
  <router-outlet></router-outlet>
</div> -->